This file contains words for the rules of plural nouns. In the Montessori sequence of teaching the rules for plural nouns there are 10 boxes for exploration. This file has been updated and contains the 3 free boxes (1-3) and words for boxes 4 to 10. The words for boxes 1 -3 are still available for free are my TpT store.
Also included are title cards and reference cards with each of the rules.